<template>
  <div class="login-container">
    <el-form
      ref="loginForm"
      :model="loginForm"
      :rules="loginRules"
      class="login-form"
      auto-complete="on"
      label-position="left"
    >
      <div class="title-container">
        <h3 class="title">实验室管理系统登录</h3>
      </div>

      <el-form-item prop="name">
        <span class="svg-container">
          <svg-icon icon-class="user" />
        </span>
        <el-input
          ref="username"
          v-model="loginForm.name"
          placeholder="name"
          type="text"
          tabindex="1"
          auto-complete="on"
        />
      </el-form-item>

      <el-form-item prop="pwd">
        <span class="svg-container">
          <svg-icon icon-class="password" />
        </span>
        <el-input
          :key="passwordType"
          ref="password"
          v-model="loginForm.pwd"
          :type="passwordType"
          placeholder="Password"
          name="password"
          tabindex="2"
          auto-complete="on"
          @keyup.enter.native="handleLogin"
        />
        <span class="show-pwd" @click="showPwd">
          <svg-icon :icon-class="passwordType === 'password' ? 'eye' : 'eye-open'" />
        </span>
      </el-form-item>

      <div style="display: flex; line-height: 10px">
        <el-form-item prop="code" style="width: 80%">
          <el-input ref="code" v-model="loginForm.code" placeholder="请输入验证码" auto-complete="on"></el-input>
        </el-form-item>

        <div class="login-code" style="margin-left: 10px" @click="refreshCode">
          <Code :identifyCode="identifyCode"></Code>
        </div>
      </div>

      <el-button type="primary" style="width: 30%; margin-bottom: 30px; float: left" @click.native.prevent="register"
        >注册</el-button
      >
      <el-button
        :loading="loading"
        type="primary"
        style="width: 30%; margin-bottom: 30px; float: right"
        @click.native.prevent="handleLogin"
        >登录</el-button
      >
    </el-form>
  </div>
</template>

<script>
import Code from './code.vue'
export default {
  name: 'Login',
  data() {
    const codes = (rule, value, callback) => {
      if (this.loginForm.code.toLowerCase() !== this.identifyCode.toLowerCase()) {
        this.refreshCode()
        callback(new Error('请填写正确验证码'))
      } else {
        callback()
      }
    }
    return {
      loginForm: {
        name: 'admin',
        pwd: '123456',
        code: ''
      },
      loginRules: {
        name: [
          {
            required: true,
            message: '请输入用户名',
            trigger: 'blur'
          },
          {
            min: 5,
            message: '用户名长度不能少于5位',
            trigger: 'blur'
          }
        ],
        pwd: [
          {
            required: true,
            message: '请输入密码',
            trigger: 'blur'
          },
          {
            min: 6,
            message: '密码长度不能少于6位',
            trigger: 'blur'
          }
        ],
        code: [
          {
            validator: codes,
            trigger: 'blur'
          }
        ]
      },
      loading: false,
      passwordType: 'password',
      redirect: undefined,
      identifyCodes: '1234567890abcdefjhijklinopqrsduvwxyz', // 随机串内容
      identifyCode: ''
    }
  },
  mounted() {
    // 初始化验证码
    this.identifyCode = ''
    this.makeCode(this.identifyCodes, 4)
  },
  components: {
    Code
  },
  watch: {
    $route: {
      handler: function (route) {
        this.redirect = route.query && route.query.redirect
      },
      immediate: true
    }
  },
  methods: {
    // 重置验证码
    refreshCode() {
      this.identifyCode = ''
      this.makeCode(this.identifyCodes, 4)
    },
    makeCode(o, l) {
      for (let i = 0; i < l; i++) {
        this.identifyCode += this.identifyCodes[this.randomNum(0, this.identifyCodes.length)]
      }
    },
    randomNum(min, max) {
      return Math.floor(Math.random() * (max - min) + min)
    },
    showPwd() {
      if (this.passwordType === 'password') {
        this.passwordType = ''
      } else {
        this.passwordType = 'password'
      }
      this.$nextTick(() => {
        this.$refs.password.focus()
      })
    },
    handleLogin() {
      console.log(this.identifyCode)
      this.$refs.loginForm.validate((valid) => {
        if (valid) {
          this.loading = true
          this.$store
            .dispatch('user/login', this.loginForm)
            .then(() => {
              this.$router.push('/')
              this.loading = false
              this.$message.success('登陆成功！')
            })
            .catch(() => {
              this.loading = false
            })
        } else {
          console.log('error submit!!')
          return false
        }
      })
    },

    // 注册
    register() {
      this.$router.push('register')
    }
  }
}
</script>

<style lang="scss">
/* 修复input 背景不协调 和光标变色 */
/* Detail see https://github.com/PanJiaChen/vue-element-admin/pull/927 */
$bg: #283443;
$cursor: #fff;
$dark_gray: #889aa4;
$light_gray: #eee;

@supports (-webkit-mask: none) and (not (cater-color: $cursor)) {
  .login-container .el-input input {
    color: $cursor;
  }
}

/* reset element-ui css */
.login-container {
  min-height: 100%;
  width: 100%;
  background-color: $bg;
  overflow: hidden;

  .el-input {
    display: inline-block;
    height: 47px;
    width: 85%;

    input {
      background: transparent;
      border: 0px;
      -webkit-appearance: none;
      border-radius: 0px;
      padding: 12px 5px 12px 15px;
      color: $light_gray;
      height: 47px;
      caret-color: $cursor;

      &:-webkit-autofill {
        box-shadow: 0 0 0px 1000px $bg inset !important;
        -webkit-text-fill-color: $cursor !important;
      }
    }
  }

  .el-form-item {
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.1);
    border-radius: 5px;
    color: #454545;
  }

  .login-form {
    position: relative;
    width: 520px;
    max-width: 100%;
    padding: 160px 35px 0;
    margin: 0 auto;
    overflow: hidden;
  }

  .tips {
    font-size: 14px;
    color: #fff;
    margin-bottom: 10px;

    span {
      &:first-of-type {
        margin-right: 16px;
      }
    }
  }

  .svg-container {
    padding: 6px 5px 6px 15px;
    color: $dark_gray;
    vertical-align: middle;
    width: 30px;
    display: inline-block;
  }

  .title-container {
    position: relative;

    .title {
      font-size: 26px;
      color: $light_gray;
      margin: 0px auto 40px auto;
      text-align: center;
      font-weight: bold;
    }
  }

  .show-pwd {
    position: absolute;
    right: 10px;
    top: 7px;
    font-size: 16px;
    color: $dark_gray;
    cursor: pointer;
    user-select: none;
  }
}
</style>
